Check out Dropbox. The 2 GB service is free and allows you to share files very quickly and easily between two or more computers. It automatically backs up, syncs files between computers, and allows you to go back in time to view previous versions. It's a very cool and very efficient system.

You might consider creating an account at Conceptua Math. This site contains a number of activities that will help you visualize what all those math problems mean. It might be just what you need to prepare for next year.